const int buttonPin = 2; 
int buttonState = 0;      
int pattern = 0;   

 void setup() {
  DDRD = B11111111;       
  pinMode(buttonPin, INPUT_PULLUP);  

 }
void loop() {
  buttonState = digitalRead(buttonPin); 
  if (buttonState == LOW) { 
    pattern = (pattern + 1) % 5; 
    delay(200); 
  }
  switch (pattern) {
    case 0:
      // Pola 1: Menyala satu-satu
      PORTD = B10000000;
      delay(100);
      PORTD = B01000000;
      delay(100);
      PORTD = B00100000;
      delay(100);
      PORTD = B00010000;
      delay(100);
      PORTD = B00001000;
      delay(100);
      PORTD = B00000100;
      delay(100);
      PORTD = B00000010;
      delay(100);
      PORTD = B00000001;
      delay(100);
      break;

    case 1:
      // Pola 2: Kelap kelip
      PORTD = B11111111;
      delay(500);
      PORTD = B00000000;
      delay(500);
      break;

    case 2:
      // Pola 3: Ganjil genap
      PORTD = B10101010;
      delay(500); 
      PORTD = B01010101;
      delay(500);
      break;

    case 3:
      // Pola 4: Menyala 3 kanan lalu 3 kiri
      PORTD = B11100000;
      delay(300);
      PORTD = B00011100;
      delay(300);
      break;

    case 4:
      // Pola 5: Tubrukan lalu kembali lagi
      PORTD = B10000100;
      delay(300);
      PORTD = B01001000;
      delay(300);
      PORTD = B00110000;
      delay(300);
      PORTD = B01001000;
      delay(300);
      PORTD = B10000100;
      delay(300);
      break;
 } 
 }